I've been tempted only twice. The first time was a pair of casual shoes I liked, but for whatever reason, I didn't pull the trigger. The second time was a pair of sneakers that I also liked and did pull the trigger. As it turns out, I'm glad I didn't buy a second pair of the first shoes, and I'm kinda sad that I bought a spare of the second.
The moral of the story - shoes last longer than you think they will, and tastes change.